HIV has not been a death sentence in this nation for about 20 years now. If you get treated and lead a healthy lifestyle your life expectancy does not change.
Source please.
If you find out you have HIV (and NOT AIDS) then if you have access to the latest treatments (not available to the poor and under-insured), and you lead a healthy lifestyle, then as of 2006 (only 4 years ago) would
some doctors tell you that you can expect a "normal" life expectancy, for some values of "normal" (ie, average life expectancy, not the life expectancy you had prior to becoming infected). Other doctors
report that same year that HIV life expectancy was only extended to 25 or so years, from the previous 20 years.
If the virus has progressed to the point where you are considered to have AIDS, then your life expectancy, with the latest treatments, healthy lifestyle, etc, is 20 years. This is far short of a "normal" life expectancy, unless, I suppose, you contract AIDS in your mid-50's.
The number of people, even in the US and other "developed" countries who have access to, and are able to afford the insurance (or the treatment itself) for all 20+ years of the remainder of their life is actually pretty small. Imagine knowing that if you lose your job, your life is on the line, given that the treatments are $14k/year on the low side, and $20k/year on the high side.
Of course, this all assumes you live a healthy lifestyle after you find out. The reality is that if you lived a healthy lifestyle prior to becoming infected your chances of infection would have been greatly reduced. It's difficult to make a sudden lifestyle chance from "unhealthy" to "healthy", so while your assertion is true - that if everything goes perfectly, then it's
possible to have a normal life expectancy - the reality is far different than the theory.
I'm not claiming that an organ transplant is better than a lifetime of antiretroviral drug therapy, but dismissing a possible treatment path (and current research topic) out of hand and passing out incorrect information does everyone a disservice.
Keep in mind that while anti-rejection drugs have drawbacks, they've been under development and testing for much longer than current HIV and AIDS therapies, and they may be more available, and cheaper than today's common HIV and AIDS treatments.
But don't worry, this is an interesting research topic, and it's not going to be the preferred treatment path for HIV/AIDS for a long time, if ever.